Manuel de ma



(No Model.)

MANUEL DE MA. GAMPOS.

LOGOMOTIVE STEAM VALVE.

No. 344,171. Patented June 22, 1886.

MANUEL DE MA. OAMPOS, OF OARDENAS, CUBA.

LOCOMOTIVE STEAiVl VALt/E.

Application filed March 11, 1886.

T0 aZZ whom it may concern:

Be it known that I, hLtNUEL nn MA. CAMPUS, a citizen of Spain, and a resident of Cardenas, Cuba, have invented certain new and useful Improvements in Locomotive Steam-Valves, of which the following is a specification.

My invention relates to balanced valves for admitting and regulating the admission of steam from the boiler to the cylinders of a locon'iotive-engine, but applicable also to other engines, whether stationary, portable, or marine.

The invention comprises the combination, with a duplex or balanced circular valve or cone-valve and the valve-easing, of a separate removable valve-seat and means of tightly securing the same in the casing, whereby the inspection, adjustment, insertion, and removal of the valve are greatly facilitated; also, the means of relieving the valve of the downward pressure and one-sided wear due to the weight of the valve-rod; also, the means of retaining the valve in any position partly or wholly open or closed without the use of the ordinary latch-lever and ratchetbar or segment.

The invention will be hereinafter fully described, and then specifically pointed out in the claims, reference being had to the accompanying drawings, in which- Figure 1 represents a longitudinal sectional elevation of my improved steamvalve, with valve-rod and operating-lever attached, the parts being shown in position as when the valve is fully closed. Fig. 2 is a rear or edge view of the operating-lever. Fig. 3 is a crosssection on the line 00 m of Fig. 1, seen in three tion of arrow 1. Fig. 4c is adet-ail perspective view, from the outside, of the detachable valve seat or piece in which the cones of the duplex valve tighten against corresponding seats or surfaces. Fig. 5 is a detail side view of the duplex cone-valve, seen from the same side as nected to the so-called dry-tube, B, which leads the steam to the casing A, and in which -?:.TICJN forming part of Letters Patent No. 84%.1'71, dated Serial No. 194,900. (Yo moth-Ll is situated the bar or rod I), by which the valve is connected to the operatinglever O on the rear end plate, D, of the boiler. The dot ted line 1) indicates the outline of the front end plate in the smoke-chamber of the boiler.

The casing A has at its inner end. a flange, (I, for securing it to the boiler and dry-tube, and at its outer or front end a flange, a, for securing to it the cover E. The rear portion of the casing A has interiorly, adjoining the dry-tube, a round bore or inlet, 0, and in front thereof a valvechamber, (7, whose opposite sides are planed and meet at an angle of about ninety degrees, forming a longitudinal V- groove in the bottom of the chamber, from the inclined sides of which issue transversely the flanged channels 0, through which, and the usual stcam-pipes connected to them, steam is admitted to the cylinders in the direction. of arrows 2 when the lever O is moved in direction of arrow 3, to open the steam-valve.

F is the valve-seat, a separate hollow casting having planed and inclined sides f meet ing below at exactly the sameangle as the inclined sides of the valve-chamber (i, so as to fit and be readily fastened steam-tightagainst the latter. Through the inclined sides f of the hollow valve-piece F are openings communicating with the transverse channels 0, and through its end walls are openings f f, forming contact surfaces or seats fitted to re ccive tightly the corresponding respectively larger and smaller valve-surfaces, 1 g, of the ordinary double-cone valve, G.

The seat-piece F is kept tightly to its place in the casingAbylatcral set-screws Ithrough the upper casting, as shown in Fig. 3, or by a set-screw placed at i centrally; or it may be tightened by wedges between it and the easing, where the screws I are shown; but the set-screws are preferable, for obvious reasons.

It will be seen with reference to Figs. 1 and 3 that thelower portion of the piece F has, in

the direction of the sliding movement of'the valve G, a solid portion, on which the weight of the valve may be supported when moving. In order, however, that this shall not support also the weight of the red I), (which is considerable, and would cause much extra wear of the valve,) I support the forward end of the said rod in a suitable semicircular sides of the chamber (Z, being held inplace in the direction of the valve movementby simply being jammed between the inner end surface of the seat-piece F and the shoulder 0, formed at the junction of the valve-chamber d and The end of the valve-rod b has a diabore a. metrically reduced portion, which passes through a hole in the axis of the valve G, the latter being secured on the rod by a nut, n, on the threaded end of the reduced portion. A pin may be inserted crosswise through a hole in the end of the rod, as shown in Fig. 1, to prevent the nut from accidentally'gettingloose. It is evident that by this construction it is an easy matter to inspect, fit, clean, adjust, remove, and replace the valve Gr, seat E, and guide-bar J without, as heretofore, removing the casing A and the steam-pipes attached to it and to the cylinders, as all the parts are conveniently accessible and removable by simply taking off the end cover, E, the pin, and nut n, and loosening the setscrews I. The outer surface (at g) of the valve G being slightly larger than the inner surface, (at g,) the tendency of the steam-pressure is that desired to keep the valve against its seats when closed; otherwise the valve is balanced, inasmuch as the steam in the chamber d presses on both ends of the valve in opposite directions.

To retain the valve in position at any degree of opening without the use of the ordinary latch-lever, (which does not allow of retaining it in any other position than those determined by the location of the notches in the segment bar or rack,) I have provided the following simple device: The hand-lever O, pivoted to a jaw, 1), upon the end of the red I), is fulerumed by a bolt, M, to and between the outer ends of two links, K, which are pivoted with their inner ends to a stationary lug, k, at the end of the boiler. On the bolt Mare suitable washers and jam-nuts, m, by tightening which the lever 0 may be clamped between the links K with friction sufficient to retain it, and thereby the valve G, in any position desired, while the pivoting of the links to the lug allows of moving the lever on its fulcrum without causing the rod I) to bind in its stuffing-box L when sliding.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination,with a casing, A, having a valve-chamber, d, with two oppositely-inclined sides, and with a valve, G, of a separate detachable hollow piece, F, formed to fit steamtight in the angle between the said inclined sides, the said piece serving as seat to the said valve, and forming the steam communication between the inlets and outlets of the casing.

2. The combination of the casing A, having two opposite sides of its valve-chamber (1 converging downward at an angle, the valve-seat F, having suitable steam-passages and converging sides to fit in the said angle, and the set-screws I, threaded through the said casing A, to press and secure the said valve-seat F firmly in the said angle. 7

3. In combination with the casing A, provided with valve-seat, and the rod 1), havingthe valve Gsecured upon it, the bar J, having guide-groove j, and placed in the said casing to support the said valve-rod, for the purpose set forth. 1

4:. In combination with the casing A, having steam-passage c, valvechamber d, with two opposite sides converging downward at an angle, a shoulder, c, at the junction between said passage and chamber, and a removable valve-seat, F, fitting the said angle, and with the valve G and valve-rod b, the bar J, having its end edges beveled at j, to fit and rest in the said angle, and aguide-groove, j, to support the said valve-rod, and being clamped in position laterally between the said valve-seat F and shoulder e, for the purpose set forth.

5. In combination with a steam-balanced valve, G, and its valve-rod Z), and with the valve-lever O, pivoted to the outerend of the said rod 1), the links K, pivoted at their inner ends to a stationary lug, 7c, and at their outer ends to the fulcrum-pin M of the said 10- ver 0, and means, substantially as described, for clamping the said levers more or less tightly between the said links, for the purpose of retaining the valve in position, as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 1st day of March, 1886.

MANUEL DE MA. OAMPOS.

Vitnesses:

J. H. WASHINGTON, F. J. LAUREN. 

